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False Earthquake Alert: Clarification from USGS on Nevada Incident
Episode 615th December 2025 • EM Morning Brief • Brian Colburn
00:00:00 00:04:16

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The discourse presented in this podcast episode encompasses a myriad of critical weather updates, reflecting a proactive approach to disseminating pertinent information regarding severe winter conditions. As winter storms loom over the Rockies and northern territories, the audience is apprised of the imminent dangers posed by heavy snow and blizzard conditions, particularly in Alaska and Colorado. The National Weather Service's warnings are clear, urging individuals to exercise caution and prepare adequately for the onslaught of adverse weather that could disrupt daily life and travel plans.

Additionally, the episode sheds light on the implications of weather phenomena on broader environmental and societal frameworks. The erroneous earthquake alert serves as a case study in the complexities surrounding disaster preparedness and the potential for misinformation to exacerbate public fear. This incident prompts a discussion on the efficacy of current alert systems and the need for continuous improvement to ensure public safety. By addressing both immediate weather concerns and long-term systemic issues, the podcast effectively engages listeners in a dialogue about the multifaceted nature of weather-related challenges and the importance of remaining vigilant and informed in the face of nature's unpredictability.

Takeaways:

  • The National Weather Service has issued multiple winter storm warnings across various states, indicating severe weather conditions.
  • In Alaska, blizzard warnings have been announced, predicting dangerous wind chills and whiteout conditions.
  • California's USGS confirmed that the reported earthquake near Carson City was a false alert, emphasizing the importance of accurate reporting.
  • Travel conditions in Colorado are expected to deteriorate significantly due to winter storm warnings, urging caution for travelers in mountainous regions.
  • Flood warnings persist in Louisiana, highlighting the need for awareness of local weather advisories and potential hazards.
  • The ongoing winter storm warnings across the Western states necessitate preparedness for extreme weather and travel disruptions.

Sources

[NWS Fairbanks AFD | https://www.weather.gov/arh/fire_afd]

[NWS Paxson/Cantwell hazard page | https://forecast.weather.gov/MapClick.php?lat=63.3756&lon=-145.4190]

[USGS false alert via Reuters | https://www.reuters.com/business/environment/usgs-says-report-nevada-earthquake-was-false-detection-by-automatic-system-2025-12-04/]

[NWS Bay Area/LOX marine statements | https://www.weather.gov/wwamap/wwatxtget.php?cwa=lox&wwa=all]

[NWS Warning text | https://forecast.weather.gov/wwamap/wwatxtget.php?cwa=usa&wwa=winter+storm+warning]

[NWS detail – Elkhead/Park | https://forecast.weather.gov/showsigwx.php?product1=Winter+Storm+Warning&warnzone=COZ004]

[NWS Missoula/ID warning roundup | https://forecast.weather.gov/wwamap/wwatxtget.php?cwa=usa&wwa=winter+storm+warning]

[NWS Pocatello alert (via LocalNews8 relay) | https://localnews8.com/weather/alerts-weather/2025/12/05/winter-storm-warning-issued-december-5-at-253am-mst-until-december-6-at-500am-mst-by-nws-pocatello-id/]

[NWS Lake Charles Flood Warning | https://forecast.weather.gov/wwamap/wwatxtget.php?cwa=usa&wwa=flood+warning]

[NWS Missoula/Billings warnings | https://forecast.weather.gov/wwamap/wwatxtget.php?cwa=usa&wwa=winter+storm+warning]

[Reuters (USGS) | https://www.reuters.com/business/environment/usgs-says-report-nevada-earthquake-was-false-detection-by-automatic-system-2025-12-04/]

[ABC10/Nevada Seismological Lab confirmation | https://www.abc10.com/article/weather/earthquakes/false-shakealert-sacramento-nevada-confirmation/103-c2c6f8da-8f11-436b-b32b-47ad48dcedc2]

[NWS Portland hazards page | https://www.weather.gov/pqr/]

[NWS Seattle hazards page | https://www.weather.gov/sew/]

[NWS Cheyenne warning text (state roundup) | https://forecast.weather.gov/wwamap/wwatxtget.php?cwa=usa&wwa=winter+storm+warning]

Transcripts

Speaker A:

Good morning.

Speaker A:

,:

Speaker A:

The National Weather Service has multiple winter storm warnings across the central and Northern Rockies, Colorado, Wyoming, Idaho and western Montana calling for heavy mountain snow, periods of near zero visibility and difficult travel through Saturday in Alaska.

Speaker A:

Blizzard warnings are up for parts of the eastern Alaska Range and Denali Burrow from tonight through the weekend with whiteout conditions and dangerous wind chills along the Gulf Coast River.

Speaker A:

Flood warnings continue in south central Louisiana and USGS confirms yesterday morning's widely distributed alert for a magnitude 5.9 near Carson City, Nevada was a false detection.

Speaker A:

No quake occurred.

Speaker A:

Let's run through the states.

Speaker A:

Alaska faces a multi day blizzard beginning tonight for the eastern Alaska Range and adjacent Denali Borough.

Speaker A:

NWS highlights sustained winds, blowing snow and whiteout conditions from 6pm Friday to Sunday afternoon.

Speaker A:

Marine forecasts also flag heavy freezing spray and gales for the northern Gulf and cook Inlet waters.

Speaker A:

California two notes today.

Speaker A:

First, the USGS ShakeAlert false earthquake alert yesterday morning pushed to phones in parts of California has been rescinded.

Speaker A:

USGS says the reported 5.9 magnitude near Carson City did not occur and the event was deleted while an investigation continues.

Speaker A:

Separately, coastal waters from the Central coast south to the Channel Islands are under small craft advisories through the weekend for hazardous seas.

Speaker A:

Beach hazards continue from LA to Santa Barbara.

Speaker A:

Colorado Winter storm warnings expand across the Elkhead Park, Gore and Flat Tops ranges from late today through Saturday night.

Speaker A:

NWS calls for 6 to 19 inches in many mountain zones with gusts up to 50 to 60 mph.

Speaker A:

Travel over high passes could become briefly impossible during peak rates tonight through Saturday morning.

Speaker A:

Delay non essential mountain travel, carry chains and check C DOT cameras before departure.

Speaker A:

Idaho A winter storm warning continues for the Clearwater Mountains and surrounding passes through Saturday afternoon with 9 to 18 inches in higher terrain and 2 to 6 inches in valleys.

Speaker A:

Separate warnings are active farther east under NWS Pocatello through early Saturday.

Speaker A:

Louisiana river flood warnings persist along portions of the Vermilion river at Lafayette and Bayou de Cannes near Eunice.

Speaker A:

NWS Lake Charles extended the warning late Thursday morning.

Speaker A:

Minor flooding continues with gradual falls forecast.

Speaker A:

Montana Western and south central Montana mountains remain under winter storm warnings through Saturday.

Speaker A:

NWS Missoula and Billings highlight 5 to 10 inches for the Potomac Seeley Lake region and higher totals in the Absaroka, Beartooth and Crazy Mountains.

Speaker A:

Gusty winds will worsen blowing snow it passes.

Speaker A:

Nevada USGS confirms the widely circulated alert for a magnitude 5.9 near Dayton, Carson City at 8:06am Thursday was a false detection by an automatic system.

Speaker A:

No earthquake occurred.

Speaker A:

Nevada Seismological lab and regional outlets reiterated there was no shaking.

Speaker A:

State and local agencies report no damages.

Speaker A:

Oregon Marine hazards Lead gale warnings and small craft advisories are posted for the coastal waters, with coastal flood statements in spots.

Speaker A:

Inland breezy conditions and showers continue.

Speaker A:

Mountains may pick up light snow.

Speaker A:

Washington Active hazards across western Washington include winter weather advisories in the Cascades, high wind warnings for parts of the coast and multiple marine advisories gales.

Speaker A:

Wyoming the Snowy and Sierra Madre ranges remain under a winter storm warning through early Sunday.

Speaker A:

NWS Cheyenne calls for periods of heavy snow and strong winds producing whiteouts over the higher terrain.

Speaker A:

All other states have no significant updates in the last 24 hours.

Speaker A:

That's your brief for Friday, December 5th.

Speaker A:

Stay safe.

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